MarkerOn

MarkerOn とは？

MarkerOn is a lightweight, open-source screen annotation tool for Windows and macOS. Press a global hotkey to draw over any app with a pen, highlighter, arrows, shapes, lines, text, and more. It runs quietly from the system tray, supports full keyboard control, undo/redo, quick screen copying, customizable colors and strokes, and optional drawing persistence between sessions. Built with Tauri, Vue, TypeScript, and Rust.